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The BLUETTI B300K Expansion Battery is a high-capacity energy storage solution designed to enhance power backup systems, off-grid setups, and solar energy applications. Engineered with LiFePO4 battery cells, this expansion unit ensures long-lasting durability and safety, making it a reliable choice for home backup and outdoor power needs. With an impressive 3072Wh capacity, it is capable of running multiple devices simultaneously, from home appliances to power tools. Its modular expandability allows users to scale up their energy storage based on their needs, seamlessly integrating with other BLUETTI power stations for increased capacity. The battery’s smart energy management system optimizes power usage, ensuring efficiency while extending battery life.
Long-Lasting LiFePO4 Battery Cells
Built with Grade-A lithium iron phosphate (LiFePO4) cells, this battery offers an extended lifespan of over 3500+ cycles, ensuring years of reliable use.
High-Capacity Power Storage
The 3072Wh capacity allows for extended use, making it perfect for home backup, RV power, and off-grid energy systems.
Expandable Power System
Designed to be stackable and expandable, it integrates seamlessly with compatible BLUETTI power stations, increasing total power storage capacity.
Multiple Charging Methods
Supports solar charging, AC wall charging, and car charging, providing versatile recharging options for different power needs.
Home Backup Power
Provides reliable backup energy during power outages, ensuring continuous operation of essential appliances such as refrigerators, medical devices, and lighting systems.
Off-Grid Energy Storage
Perfect for solar power systems in remote locations, offering a sustainable and independent energy source for cabins, farms, and off-grid homes.
RV & Van Life
Enhances off-grid power solutions for travelers and adventurers, enabling extended trips without reliance on traditional power sources.
Emergency Preparedness
Ensures access to electricity during disasters or grid failures, providing peace of mind for homeowners and businesses.
Sustainable Energy Use
Reduces reliance on the grid by storing excess solar energy for later use, lowering electricity costs and promoting green energy adoption.
Everything you need is included with your product.
| Specification | Details |
| Model | B300K |
| Battery Capacity | 2,764.8Wh (51.2V, 54Ah) |
| Battery Type | LiFePO₄ (Lithium Iron Phosphate) |
| Life Cycles | 4,000+ Cycles to 80% Original Capacity |
| Specification | Details |
| USB-A | 12W Max., 5V / 2.4A |
| Specification | Details |
| Net Weight | Approx. 29.5kg (65.04lbs) |
| Dimensions (L × W × H) | 525 × 327 × 209mm | 20.67 × 12.87 × 8.23in |
| Charging Temperature | 0°C to 40°C | 32°F to 104°F |
| Discharging Temperature | -20°C to 40°C | -4°F to 104°F |
| Storage Temperature | Up to 1 month: -20°C to 40°C | -4°F to 104°F Up to 6 months: -20°C to 25°C | -4°F to 77°F |
| Working Humidity | 5% to 95%RH |
| Charging Current | 60A Max. (Current may decrease outside specified temperatures) |
| 2 × Expansion Port | 58.4VDC Max., 90A Max. |
What BLUETTI power stations are compatible with the B300K Expansion Battery?
The BLUETTI B300K is designed to work with various BLUETTI power stations, including the AC200MAX, AC300, and EP500 Pro. It seamlessly integrates with these systems to expand their overall storage capacity, ensuring long-term power supply. Additionally, it supports future BLUETTI models with compatible BMS communication for enhanced energy management.
Can this battery be used as a standalone power source?
No, the B300K is an expansion battery and requires a compatible BLUETTI power station for operation. It is designed to enhance existing power systems rather than function independently. However, when connected to a power station, it significantly extends the available runtime for essential appliances.
How long does it take to recharge using solar panels?
The recharge time depends on the solar input capacity and the number of panels used. With a fully optimized solar setup, the B300K can recharge in approximately 4-6 hours under direct sunlight using BLUETTI solar panels. Charging times may vary based on environmental factors, panel wattage, and available sunlight. For even faster recharging, it supports dual-input charging, allowing simultaneous solar and AC input for increased efficiency.
Does the B300K support pass-through charging?
Yes, the BLUETTI B300K supports pass-through charging, allowing you to use the battery while it is being charged. This feature ensures uninterrupted power supply during charging cycles.
Can the B300K be used in extreme temperatures?
The battery is designed to operate efficiently in a temperature range of 14°F to 113°F (-10°C to 45°C). However, for optimal performance and longevity, it is recommended to keep it in a temperature-controlled environment.
How many B300K units can be connected together?
Multiple B300K expansion batteries can be connected to compatible BLUETTI power stations, significantly increasing overall capacity. Check the specific power station model for its expansion limitations.
Can the B300K be charged using third-party solar panels?
Yes, the B300K supports third-party solar panels as long as they meet the required input specifications. Ensure the voltage and connector compatibility before using non-BLUETTI panels.
